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United States Patent | 5,006,294 |
Bice ,   et al. | April 9, 1991 |
A stretch broken fiber reinforced resin tow is formed from resin reinforced with continuous filaments by tensioning the two while heating it to a temperature sufficient to soften the resin in the tensioning zone to break all of the filaments in a random manner.
Inventors: | Bice; Archie R. (Landenberg, PA); Edison; David H. (Hockessin, DE); Fish, Jr.; Floyd H. (Centreville, DE); Hopkins; Mark W. (Newark, DE); Okine; Richard K. (Wilmington, DE) |
Assignee: | E. I. Du Pont de Nemours and Company (Wilmington, DE) |
Appl. No.: | 344973 |
Filed: | April 26, 1989 |
Current U.S. Class: | 264/138; 57/2; 57/310; 156/180; 156/250; 264/154; 264/288.8; 264/DIG.47 |
Intern'l Class: | B29C 055/00; B29C 067/14 |
Field of Search: | 264/138,288.8,DIG. 47,154 156/180,181,229,250 57/2,310 |
3864184 | Feb., 1975 | Crandall et al. | 156/180. |
4759985 | Jul., 1988 | Armiger et al. | 428/367. |